You can use this same command to update all modules at once by simply typing "drush upc" without specifying a project name.
I've installed and enabled old versions of the Features and Devel modules to show you how this works. So, I'll just run the update command without specifying a project.
- drush upc
Now, you'll see that there are updates to both modules, and Drush states that code updates will be made to Devel and Features. I'll type "y" and push enter. Now you'll see a notice at the bottom that says there are pending database updates. Let's take a look at how to update the database using Drush.